Permanent Magnet Motor; Installation And Maintenance Work; Operation - ABB ACS800-U4 Hardware Manual

Permanent magnet motor

These are additional warnings concerning permanent magnet motor drives.
WARNING! Do not work on the drive when the permanent magnet motor is rotating.
Also when the supply power is switched off, a rotating permanent magnet motor
feeds power to the intermediate circuit of the drive and also the supply connections
become live (even when the inverter is stopped!).

Installation and maintenance work

• Disconnect the motor from the drive with a safety switch
and additionally if possible
• lock the motor shaft and ground the motor connection terminals temporarily by
connecting them together as well as to the PE.

Operation

Do not run the motor over the rated speed. Motor overspeed leads to overvoltage
which may explode the capacitors in the intermediate circuit of the drive.
15
Safety instructions